21279445702911 has 48 divisors (see below), whose sum is σ = 35297012125440. Its totient is φ = 12217530620160.

The previous prime is 21279445702859. The next prime is 21279445702951. The reversal of 21279445702911 is 11920754497212.

21279445702911 is a `hidden beast` number, since 2 + 1 + 2 + 7 + 9 + 44 + 570 + 29 + 1 + 1 = 666.

It is not a de Polignac number, because 21279445702911 - 2⁹ = 21279445702399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21279445702951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79954486 + ... + 80220188.

It is an arithmetic number, because the mean of its divisors is an integer number (735354419280).

Almost surely, 2^{21279445702911} is an apocalyptic number.

21279445702911 is a deficient number, since it is larger than the sum of its proper divisors (14017566422529).

21279445702911 is a wasteful number, since it uses less digits than its factorization.

21279445702911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308316 (or 308313 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 21279445702911 in words is "twenty-one trillion, two hundred seventy-nine billion, four hundred forty-five million, seven hundred two thousand, nine hundred eleven".